Block for wire-drawing machines.



Patented Dec. l9

- J. M. CHATFIELD.

BLOCK FOR WIBE DRAWING MACHINES.

(Application filed Apr. 1'7, 1899.) (No Model.) 4 Sheets-Sheet l.

llllllllllllllflllllllllll 1mm lllllllllll THE NORRIS PETERS cu, PNOYQLITHQ. WAsHmumu, D. c.

No. 639,664. Patented Dec. l9, I899. J. M. CHATFIELD.

BLOCK FOR WIRE DRAWING MACHINES.

(N M d (Application filed Apr. 17, 1899.)

4 sheets sheat No. 639,664. Patented Dec. l9, I899.

' J. M. CHATFIELD.

BLOCK FOR WIRE DRAWING MACHINES.

(Application filed Apr. 17, 1899.)

(No Model.)

4 sheets-sheet 3.

(No Model.)

TFIELD. V BLOCK FOB WIB AWING MACHINES.

(A *ie tio A r. 17, 1899.)

' Patented Dec. l9, I899.

' NlTE'D STATES PATENT rrrcn.

JAMES M. CHATFIELD, OF THOMASTON, CONNECTICUT;

BLOCK FOR WIRE-DRAWING MACHINES.

SPEOIFICA TION forming part of Letters Patent No. 639,664, dated December 19, 1899 Application filed hpril17, 1899.

To all whom it may concern.-

Beit known that I, J AMES M. CHATFIELD, of Thomaston, in the county of Litchfield and State of Connecticut, have invented a new Improvement in Blocks for \Vire-Drawing' Machines; and I do hereby declare the fol lowing, when taken in connection with theaccompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1, a side view of a block for wiredrawing machines with so much of the adjacent mechanism as is necessary to a clear understanding of the invention; Fig. 2, a top view of the block and wire-drawing die enlarged; Fig. 3, a sectional view on the line a b of Fig. 2; Fig. 4, a transverse section on the line 0 d of Fig. 3'; Fig. 5, an under side View of the head; Fig. 6, a sectional view on the line 6 f of Fig. 3; Fig. 7, a perspective view of the clutch-block detached; Fig. 8, a perspective view of the dog for connecting the head with the clutch-block detached.

This invention relates to an improvement in wire-drawing machines, and particularly to the construction of the blocks therefor, the object of the invention being to provide a block with devices connected therewith for grasping the wire and holding it as the block is revolved, so as to draw the wire through the reducing-die; and it consists in the construction as hereinafter described, and particularly recited in the claims.

In the bed A, I mount a bushing B, having a vertical opening for the reception of a spindle C, which spindle is adapted to be continuously revolved by any suitable means, here represented as by a train of gearing a, b, c, and d, driven bya driving-wheel D. Over the spindle I place a drawing-block E, which comprises a shell having tapering side walls F, flaring at their lower edge to form a flange G, and with a transverse partition H, which is adapted to rest upon the upper end of the bushing and so that the flange G is supported just above the surface of the bed A- On the upper face of the partition H is a stop-lug I, the purpose of which will hereinafter appear. WVithin the upper part of the block is a clutchblock J, which is keyed to the shaft C by a Serial No. 713,233. (No model.)

spline 6, whereby it will be caused to rotate with the shaft, and by a set-screw f, whereby it will be held against vertical movement thereon. This clutch-block is formed with an annular shoulder J at its lower edge and on opposite sides with beveled notches K for the purpose as will hereinafter appear. Over the upper end of the spindle and surrounding the clutch'J is a circular head L, corresponding substantially in diameter to the internal diameter of the block and recessed, was to set down over the clutch-block J. This head is supported above the upper face of the partition H by an annular shoulder M, formed on the inner wall of the block E, and from the lower face of the head L depends a lug N, adapted to engage with the stop I, which is fixed to the partition H. To the lower face of this head L is a fixed annular bearing-ring O, corresponding in internal diameter to the external diameter of the shoulder J of the clutch-block J. This ring is secured to the head L by screws P or other suitable means and is employed to give proper support to the head and is made independent of the head, so that the head may be readily cast. lVithin the recessed portion of the head which sets over the clutch-block J is a notch Q, and in the notch is mounted a dog R upon a rock-shaft S, which extends through'the upper face of the head, where it is provided with an operating-handle S. This dog is adapted to be turned so as to extend into the notches K of the clutch-block J and so as to interlock the block with the head L. Preferably a spring 8 will be connected with the operating-handle S, the tendency of said spring being to turn the handle so as to normally hold the dog within the recess Qof the head- L and out of engagement with the clutch-block J. The upper end of the head L-is formed with an annular cam-surface T, terminating in a shoulder T, and to the edge of this cam is fixed a chain U, the outer end of which is connected to what is mechanically termed tongs V, which is adapted to clutch the end of the wire g after it has been passed through the reducing-die W, which may be of any approved construction. The wall F of the block E is cut away, as at'X', for the passage of the tongs V and so that as the IOC head. As before stated, the drawing-die W may be of any approved construction and arranged in any desired manner. As herein shown, it is mounted in a frame W, connected to one end of a lever H, which is pivoted near the surface of the bed A and provided at its opposite end with a counterbalancingweight 2'. The block is adapted to be supported in line with the upper end of the drawing-die by means of an arm j, pivoted to the bed A and furnished at its upper end with a handle 7r, by which the said arm may be turned so as tothrow the arm from beneath the drawing-die. The object of this arrangement is that when the drawing com- Inences the die will be held up in line with the notch V in the block, so that the tongs may enter therein, after which the handle 7r is turned so as to disengage the drawing-die from the arm j, permitting it to gradually fall, as shown in broken lines, Fig. 1, until it is in line with the lower portion of the drawingblock and so that the wire will be wound around thelower end of the block, upon which it is supported by the flange G, the wire being drawn from a reel min the usual manner. When the drawing is completed, the drawing-die WV under the action of the counterbalancing-weight I will be lifted to its raised position, as shown in full lines, Fig: 1.

The operation of the machine is as follows: The spindle G is constantly driven and with it the clutch-block J. In starting the wire is first passed through the drawing-die W in the usual manner and to such an extent that it may be grasped by the tongs V, which are drawn out from the block E, as shown in Fig. 2, the block having been turned backward on the clutch-block J. When thus engaged with the wire, the rod S is turned so as to throw the dog R inward and so that it will during the rotation of the clutch-block J enter one of the notches K, and thereby interlock the head L with the said clutch-block and so as to cause the head L to revolve. Owing to the cam-surface Y the initial movement imparted to the chain U will be a gradual one and will easily start the wire through the drawing-die. As the head L revolves the tongs will be finally drawn within the block E and so as to rest against the shoulder T of the head L. When the tongs are thus within the block E, the lug N in the under face of the head L engages with the stop I on the upper face of the partition H of the block E and so as to cause the said block to rotate with the shaft 0. .At this time the operator moves the handle 7t so as to throw the arm J out of engagement with the drawing-die W, which, being pivoted near the-bed A, will gradually descend, and so that the wire will be wound around the lower end of the said block. The ring 0, which is fixed tothe head L, supports the lower end of the head against the shoulder at the lower end of the clutch J and so that the members are as rigid as necessary in wire-drawin g. The block 'E, being supported on the shaft near its lower the die will under the action of the counter- I balancing-weight 2' rise to its former position and engage with the upper end of the arm j. When the wire is wound upon the block, it may be readily removed, owing to the tapering sides and the fact that the tongs is located within the block and so as-not to 0bstruet the removal of the wire. lVith this device the wire is easily engaged with the block and as readily detached therefrom.

Having fully described my invention,what I claim as new, and desire to secure byLetters Patent, is-

1. A block for wire-drawing machines,comprising a vertically-arranged spindle adapted to be revolved, a block on the said spindle having a chamber in its upper end, a clutchbloek fixed to said spindle within the said chamber, and a head also Within said cham her and adapted to set over said clutch-block, and means for coupling said head with the clutch-block and the d rawing-block, substantially as described.

2. A block for wire-drawing machines,comprising a vertically-supported rotary spindle,- a shell on said spindle, said shell formed with a transverse partition and with a stop-lug on said partition, aclutch-block on said spindle with which it is coupled for rotation, a head also mounted on the said shaft within said shell and recessed in its under faceto set over said clutch-block,and formed in its under face with a stop-lug for engagement with the stop lug on the transverse partition,and means for coupling said head with the clutch-bl0ck,substantially as described.

3. A block for wire-drawing machines comprising a vertically-supported rotary spindle, a block on said spindle and formed with a chamber in its upper end, a clutch-block in said chamber on said spindle to which it is keyed for rotation,a head also arranged in said chamber and adapted to set over said clutchblock, said clutch-block formed in one side with a notch, and a dog mountedin the said head and adapted to be turned into said notch, whereby the head is coupled with the clutchblock,and means for engagement between the head and the shel1,substantially as described.

4. A block for wire-drawin g machines,comprising a vertically-arranged rotary spindle, a shell-like drawing-block mounted thereon, a clutch-block within said shell, and keyed to the spindle for rotation therewith, a head in said shell, and adapted to set over said clutchblock, means for coupling said head with the c1utch-b10ck and with theshe11,tl1e upper end In testimony whereof I have signed this of said head formed with a. cam-surface below specification in the presence of two subscribthe upper end of said shell, which is formed ing witnesses.

with a. clearance-notch, and tongs secured to l JAMES M. OHATFIELD. said head and adapted to be drawn through Witnesses:

said notch into said shell, substantially as de- EDWARD O. STOUGHTON,

scribed. WM. B. PRATT. 

